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Given : C("diamond")+O(2)rarrCO(2),De...

Given :
`C("diamond")+O_(2)rarrCO_(2),DeltaH=-395 kJ`
`C("graphite")+O_(2)rarrCO_(2),DeltaH=-393 kJ`
The enthalpy of formation of diamond from graphite is

A

`+2.0 kJ`

B

`-1.5 kJ`

C

`-788 kJ`

D

`788 kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
Subtract `(i)` from `(ii)`
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
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  3. Given : C("diamond")+O(2)rarrCO(2),DeltaH=-395 kJ C("graphite"...

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  4. The law of Lavoisier and Laplace illustrates

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  5. For the reaction H(2)+I(2)hArr2NHI, DeltaH=12.40 kcal. The heat of f...

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  6. According to the reaction C(6)H(6)+15//2O(2)to3H(2)O+6CO(2) (Delta...

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  7. Thermodynamic equilibrium involves

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  8. In general, for exothermic reactions to be spontaneous

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  10. Which of the following is true for a reaction H(2)O(l)toH(2)O(g) at 10...

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  11. The free energy change DeltaG = 0, when

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  12. {:(Given :,C+2StoCS(2),DeltaH=117 kJ),(,C+O(2)toCO(2),DeltaH=-393 kJ),...

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  13. The enthalpies of combustion of carbon and carbon monoxide are -390 kJ...

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  14. The combustion reaction occuring in an automobile is 2C(8)H(18)+25O(2)...

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  15. Latent heat of vaporisation of a liquid at 500K and 1 atm pressure is ...

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  16. The table given below lists the bond dissociation energy (E("diss")) f...

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  17. The enthalpy of formation for C(2)H(4)(g), CO(2)(g) and H(2)O(l) at 25...

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  18. For a reaction to occur spontaneously

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  19. For a process to be spontaneous

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  20. A particular reaction has a negative value for the free energy change...

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